hotponyshoes
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- 6,411
- Location
- Somerset. Uk
So just tried mig on alloy for the first time.
Previously been using ac tig for this.
With the tig I strike the arc with the pedal down and wait for the puddle to form before feeding filler and moving off..
What's the correct way to do this with a mig?
I started off with getting a pile of filler building up before getting the heat into it or a run that was cold at the start.
On the bit below (run is from left to right) I started away from the edge, then went back to the edge on the left, then ran back over the first bit of weld to the right before continuing. That's left me with a high spot that's gone a bit dull.
Also, what's the best way of avoiding a crater at the end?
Running backwards seems to give it too much heat and melt it. Do I just stop welding at the end, keep it under the post flow, then give it another quick blob?
Previously been using ac tig for this.
With the tig I strike the arc with the pedal down and wait for the puddle to form before feeding filler and moving off..
What's the correct way to do this with a mig?
I started off with getting a pile of filler building up before getting the heat into it or a run that was cold at the start.
On the bit below (run is from left to right) I started away from the edge, then went back to the edge on the left, then ran back over the first bit of weld to the right before continuing. That's left me with a high spot that's gone a bit dull.
Also, what's the best way of avoiding a crater at the end?
Running backwards seems to give it too much heat and melt it. Do I just stop welding at the end, keep it under the post flow, then give it another quick blob?